Pulley support for crown blocks



g 927 E. TIMBS PULLEY SUEPORT FOR CROWN BLOCKS- gwuwnto o Filed may 26, 1925 Patented Aug. 16, 1927.

rnnirsn STATE-S EDWARD TIMBS, or'Los ANGELES, CALIFORNIA, ASSIGNOR To Umonirooi. COMPANY,

PATENT. OFFICE.

OF TORRANGE, CALIFORNIA, A CORPORATION OF CALIFORNIA.

PULIiEY SUFPPOR'I" FOR CROWN BLOCKS.

. Application filed May 26, 1925. Serial m. 33,038.

This invention relates to pulley supports for the crown blocks usedon de-rr-ic ks in the drilling of oil wells.

An object. of the invent-ionis to effect clampingfof the shaft without materially weakening said shaft.

It has been the prior practice in clamping the shafts on which the pulleys are rotatably mounted, to provide the u-nderside of the shaft with a fiat surface which rests directly upon the beams that constitute portions of the crown block, and to provide straps that pass over the shaft and are bolted solidly to the flanges of the'beams. By the invention present construction, I avoid the cutting and weakening of the shaft in this manner.

An important object is to provide an effective construction for preventing the pulley from rubbing against the rough cast surfaces of the bearing block and cap.

Other objects and advantages will appear in the subjointed detailed description.

The accompanying drawings illustrate the Fig. l is a'longitudinal View, partly in section, of a pulleysupportconstructed 111 accordance with the provisions of this invention, a pulley and a pairof beams of the crown block being indicated in broken lines. 2 is an enlarged fragmental plan section on the line indicated by 2*2, Fig.1. Fig. is a sectional elevation on'theline indicated by 33, 2. I

Fig. 4 is a sectional elevation on the line indicated by 4- 1, Fig. 2.

There is provided shaft 6 adaptedto' rotatably support a pulley, which-is inclicated in broken lines at a and which forms no part of the present invention. The shaft is provided with recesses 7 1n 1ts' upper side at its opposite ends andsaid shaft rests within concave seats 8 formed in bearing members 9 which are adapted to rest on the upper faces of the top flanges of the I-- beams Z) of the crown block. I I v The end portions of the shaft 6 are enclosed by caps 10 which extendaround the sides and over the outer ends of the bear-'.

ings 9 and shaft 6 so as to straddle the bearings, being spaced, slightly from said bearings and from the shaft excepting where internal flat shoulders 11 of the caps engage and seat upon the upper flat faces 20 of the shaft recesses 7. Each cap is provided with four vertical bolt holes through which extend bolts 13, the lower ends of said bolts having laterally extend-- ing shoulders 1 1 adapted (to engage beneath the upper flanges of the I-beams Z2. These bolts serve the double purpose of holding the capslt) and bearings .9 stationary. The

side walls .of each cap 10 are indicated at 15 and the end wall at 16.

To feed lubricant tothe pulley a the shaft 6 is provided with a duct .17 whichpopens through the upper face .ofthe shaft and which connn'un-icates with a filling nipple 18..which projects into an opening'19 in the" upper face of. one of the caps. I

To operate the invention, a pulleywill be mounted on the shaft 6 and then the shaft will .be placed in the bearing seats8 with the recesses 7v uppermost. The caps 10 will then beplaced in position to rest the shoulders 11 upon the upper faces of the recesses and the bolts will besecured to the Isbeams.

It will be seen that the bearings 9 and caps are slid-able to any desired position" along the beams before the bolts are secured,

thus making the support readily adjustable ends which may be left rough as cast. j These plates 21 have straight side edges that engage shoulders'22 formed by cars 23 through which some theIbolts 13 pass, thus to prevent rotation of the plates 21 in contact with the relatively rough blocks and caps and thus preventing excessive Wear of the plates.

The shaft 16 extends through the plates 21 and also through circular wear plates 24 whichare interposed between the plates 21 and the end faces of the hub of the pulley a so that when contact between the pulley and the plates 24 occurs the against the plates 21.

ltis a'dvisable to lubricate the adjacent faces of the plates 21, 24 and, accordingly,' the plates 21 are provided with openings 25 plates 24 will rub through which lubricantmay pass. from the hub bore or pulley bearing to said faces.

I claim the bearing 7 1. A pulley support for a crown block,

comprising a shaft having recesses in its upper side at its opposite ends, bearings having concave seats for the shaft to rest lit) in, caps straddling the bearings provided with internal shoulders engaging in the recesses, and means passing through the caps outside of the hearings to secure the caps to beams. i

2. A pulley support for a crown block, comprising a shaft having recesses in its upper side at its opposite ends, bearings having concave seats for the shaft to rest in, caps provided with internal shoulders engaging in the recesses, said caps enclosing the bearings and the end portions of the shafts, and means passing through the caps outside of the bearings to secure the caps to beams.

coin arisin a shaft havin recesses in its up 29 CD A per side at its opposite ends, bearings having concave seats for the shaft to rest in, caps provided with internal shoulders engaging in the recesses, the caps having side walls extending down at the sides of the shaft and the caps having end walls extending down at the ends of the shaft, and means to secure the caps to beains.

5. A pulley support 'for a crown block, comprising a shaft having recesses in its upper side at its opposite ends, bearings having concave seats for the shaft to rest in,

caps straddling the bearings and provided with internal shoulders engaging in the recesses, and bolts extending through thecaps outside of the bearings and having shoulders to engage'beneath the flanges of I-beains on which the bearings rest.

6. A pulley support for a crown block,

comprising a shaft, bearing blocks having concave seats for the shaft to rest in, caps for the bearing blocks having shoulders, cooperating neans between the shaft and caps to prevent turning of the shaft, means to secure the capsvto beams, wear plates adjacent to the inner ends of the bearing blocks and having straight edges to engage the shoulders to prevent turning of said plates, and other wear plates to engage the first in s for the passage of a lubricant.

comprising a shaft having recessesin its upper side at its opposite ends, bearings havingconcave seats for the shaft to rest in,

caps provided with internal shoulders engaging in the recesses, said caps having ears. extending beyond the planes of the adjacent ends of the bearings on opposite sides of the bearings, and bolts extending through the m ntioned wear plates provided with open pulley support for a crown block,

ears and having shoulders to engage beneath the flanges of I-beanis on which the bear ings rest.

8. A pulley support for a crown block, comprising a shaft havingrecessesin its upper side at its oppositeends,bearings having concave seats for the shaft to rest in, caps provided with internal shoulders engaging in the recesses, said caps having forming shoulders, bolts extending through the ears and having shoulders to l! engage beneath the flanges oi I-beanis on which the bearings rest, wear plates adjacent to the inner ends of the bearings provided with straight side edges engaging the second shoulders, and circular wear plates.

surrounding the shaft adjacent to the first plates and provided with openin s for lubricant.

Signed 18th day of May, 1925.

I EDWARD TIMES.

Los Angeles, California, this 

